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ERIC Number: EJ943480
Record Type: Journal
Publication Date: 2011-Sep
Pages: 4
Abstractor: As Provided
Reference Count: 4
ISSN: ISSN-0031-9120
Magic Mirrors
Mills, Allan
Physics Education, v46 n5 p595-598 Sep 2011
"Magic mirrors" were so named because, when they were positioned to throw a reflected patch of sunlight on a nearby wall, this area contained an outline of a design cast on the back of the (bronze) mirror. Investigations begun in the 19th century showed that this was a response to heavy localized pressures exerted on the face of the thin mirror during the polishing process. It has proved possible to reproduce this phenomenon with inexpensive stamped medallions, and also to make mirrors either with plain backs or engraved with designs quite different from those in the reflected images. (Contains 1 footnote and 8 figures.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A